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finmath lib is a Mathematical Finance Library in Java.
It provides algorithms and methodologies related to mathematical finance.
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package net.finmath.fouriermethod.calibration;
/**
* Base interface for scalar parameter constraints.
*
* @author Alessandro Gnoatto
*
*/
public interface ScalarConstraint extends Constraint{
/**
* Forces the parameter to respect a certain condition.
*
* @param parameterToTest The value to which the constraint should be applied.
* @return the parameter after application of the constraint.
*/
double apply(double parameterToTest);
/**
* Returns the lower bound, possibly given by Double.NEGATIVE_INFINITY.
* @return the lower bound.
*/
double getLowerBound();
/**
* Returns the upper bound, possibly given by Double.POSITIVE_INFINITY.
* @return the upper bound.
*/
double getUpperBound();
}